Radial roof ventilators with upward flow outlet CROV

CROV® radial roof ventilators with flow outlet to the top - Roof ventilators have a barrel-shaped casing with free air outlet to the top, low height and weight; there is a special protection of the room from atmospheric precipitation. These fans also use impeller modifications with six (CROV60 and CROV61) and nine (CROV91) backward curved blades of special shape with a dense row of R20 values of wheel diameters.

The possibility to work with very high pressures (up to 2000 Pa), is achieved due to increased rotational speeds of impellers, which requires additional strength and balancing. "VEZA" offers to use with roof ventilators Variable Frequency Drive (VFD) - only in DUV400/600 mode, fans DUV400/600 with VFD are not used. This version of fans has passed special tests in the certification centre on the real fire cooker, in accordance with GOST R 53302-2009 and SP 7.13330-2013.